CN111381377B - Near-to-eye display device - Google Patents
Near-to-eye display device Download PDFInfo
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- CN111381377B CN111381377B CN202010332137.2A CN202010332137A CN111381377B CN 111381377 B CN111381377 B CN 111381377B CN 202010332137 A CN202010332137 A CN 202010332137A CN 111381377 B CN111381377 B CN 111381377B
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- 210000001508 eye Anatomy 0.000 claims abstract description 49
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 238000003384 imaging method Methods 0.000 claims description 17
- 210000001747 pupil Anatomy 0.000 claims description 11
- 230000004424 eye movement Effects 0.000 claims description 5
- 238000005286 illumination Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 2
- 230000003190 augmentative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000005252 bulbus oculi Anatomy 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004270 retinal projection Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0093—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0176—Head mounted characterised by mechanical features
Abstract
The embodiment of the application relates to the technical field of optical design, and discloses near-eye display equipment, which comprises: the near-to-eye display system provided by the embodiment of the application can adjust the orientation of the waveguide sheet and the display device in space through the first adjustable device and the adjustable support so as to adjust the depth of field of a virtual image incident to human eyes.
Description
Technical Field
The embodiment of the application relates to the technical field of optical design, in particular to near-to-eye display equipment.
Background
Augmented reality is a technology that merges virtual information with the real world, where near-eye display devices are key links in the augmented reality technology, and the near-eye display devices can allow a user to see the real world while seeing virtual images built by a computer. Binocular parallax refers to the difference between left and right eye imaging when eyes see the same object, and is one of important physiological factors for judging the distance of the object by eyes, and the parallax is smaller as the observed object is far and the parallax is larger as the object is close. The center sight is the connecting line of the center of the object and the center of the pupil when the binocular looks at a single object, the binocular center sight is almost parallel when looking up at the sky, the human eyes feel that the sky is at infinity, and a certain included angle exists between the binocular center sight when the binocular looks at the object in front, so that the human eyes feel that the object is near in front of the eyes, and therefore, the far and near of the virtual image can be adjusted by adjusting the included angle of the center sight when the binocular virtual images are fused, and the depth of field adjustment of the virtual image is realized.
In the process of implementing the embodiments of the present application, the inventors found that at least the following problems exist in the above related art: the existing binocular near-eye display equipment generally has only one depth of field, the depth of field is fixed and cannot be adjusted, binocular vision is always focused on a plane when a human eye watches a virtual object, and the vision is required to be constantly switched back and forth between a real scene and a virtual picture when the human eye watches far or near, so that the virtual object is difficult to be well fused with the real environment, the dizziness caused by a user is reduced, the user experience is reduced, and the use requirement of multiple scenes is difficult to be met.
Disclosure of Invention
In view of the foregoing drawbacks of the prior art, an object of an embodiment of the present application is to provide a near-to-eye display device with an adjustable depth of field.
The aim of the embodiment of the application is realized by the following technical scheme:
in order to solve the above technical problems, an embodiment of the present application provides a near-eye display device, including: a frame comprising two frame supports;
the two waveguide sheets are used for outputting imaging light rays to human eyes and are respectively arranged on the two mirror frame brackets;
the first adjustable device is used for adjusting the included angle between the two waveguide sheets, and the two lens frame supports are integrally arranged through the first adjustable device;
two display devices for outputting imaging light into the waveguide sheet on the corresponding frame support;
and one end of the adjustable bracket is integrally installed with the mirror frame bracket, and the other end of the adjustable bracket is integrally installed with the display device and is used for adjusting the relative angle between the display device and the waveguide piece.
In some embodiments, a second adjustable means is provided on one of the adjustable brackets for adjusting the angle between the display device and the waveguide sheet.
In some embodiments, the first adjustable means comprises a first adjustable knob, wherein the angle between the two waveguide plates is adjustable by rotating the adjustable knob.
In some embodiments, the second adjustable means comprises a second adjustable knob and a third adjustable knob, wherein the angle of deflection of the display device in the horizontal direction is adjustable by rotating the second adjustable knob, and the angle of deflection of the display device in the horizontal direction is also adjustable by rotating the third adjustable knob.
In some embodiments, further comprising: and the eye movement tracking device is arranged on the mirror frame or the waveguide sheet and is used for tracking the rotation angle of the pupil of the human eye so as to acquire the gazing distance of the human eye.
In some embodiments, the eye-tracking device comprises: the infrared ray transmitting device and the infrared ray receiving device are arranged towards human eyes.
In some embodiments, further comprising: and the micro controller is respectively connected with the display device, the first adjustable device, the second adjustable device and the eye movement tracking device.
In some embodiments, the waveguide sheet is a grating light waveguide or a geometric array light waveguide, the light emitting surface of the display device is disposed towards the coupling-in region of the waveguide sheet, and the coupling-out region of the waveguide sheet is disposed towards the human eye.
In some embodiments, the display device includes: a micro display screen, an illumination device and/or a collimating lens group.
In some embodiments, the micro display is one of MEMS, LCD, LED, OLED, DLP, LCOS.
Compared with the prior art, the application has the beneficial effects that: in contrast to the prior art, embodiments of the present application provide a near-eye display device, including: the near-to-eye display system provided by the embodiment of the application can adjust the orientation of the waveguide sheet and the display device in space through the first adjustable device and the adjustable support so as to adjust the depth of field of a virtual image incident to human eyes.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements/modules and steps, and in which the figures do not include the true to scale unless expressly indicated by the contrary reference numerals.
Fig. 1 is a schematic diagram of a calculation principle of a binocular central line of sight included angle of a virtual image at a spatial point position according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a near-eye display device according to an embodiment of the present application;
FIG. 3 is a schematic top view of a near-eye display device according to an embodiment of the present application;
fig. 4 is another schematic top view of a near-eye display device according to an embodiment of the present application.
Detailed Description
The present application will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present application, but are not intended to limit the application in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present application.
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It should be noted that, if not in conflict, the features of the embodiments of the present application may be combined with each other, which is within the protection scope of the present application. In addition, although functional block division is performed in the device schematic, in some cases, block division may be different from that in the device. Moreover, the words "first," "second," and the like as used herein do not limit the data and order of execution, but merely distinguish between identical or similar items that have substantially the same function and effect.
It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only. In order to facilitate the connection structure definition, the present application performs the position definition of the component with reference to the spatial position of the near-eye display device when the near-eye display device is being worn by a person standing or sitting, for example, the waveguide sheet is disposed "in front" of the human eye.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.
In addition, the technical features of the embodiments of the present application described below may be combined with each other as long as they do not collide with each other.
The interpupillary distance refers to the distance between the eyes' binocular pupils of a human eye, and the interpupillary distance of an adult is usually between 50-70mm, and for a virtual display image, the center line of sight is defined as the line connecting the center of the image of the binocular overlapping portion and the center of the pupils. Please refer to fig. 1, which illustrates a calculation principle of a binocular central line of sight angle of a virtual image at a spatial point position, which is easily obtained by fig. 1 and a geometric calculation theorem, wherein a calculation formula of the binocular central line of sight angle is as follows:
wherein θ represents the binocular central line-of-sight angle, L represents the pupil distance, and D represents the distance between the binocular displayed virtual image and the binocular.
Taking the pupil distance L as 70mm as an example, the binocular central sight line included angle theta is 8 degrees when the distance D is 0.5m and tends to be 0 degrees when the distance D approaches infinity, so that for a user with the pupil distance of 70mm, the adjustment of the binocular central sight line included angle theta between 0 and 8 degrees can realize the adjustment of the virtual image imaging position (namely the depth of field) from 0.5m in front of eyes to infinity.
Based on the above principle, the present application provides a near-eye display device capable of adjusting a virtual image imaging position, i.e., a depth of field, the near-eye display device including: the near-to-eye display system provided by the embodiment of the application can adjust the orientation of the waveguide sheet and the display device in space through the first adjustable device and the adjustable support so as to adjust the depth of field of a virtual image incident to human eyes.
In particular, embodiments of the present application are further described below with reference to the accompanying drawings.
An embodiment of the present application provides a near-eye display device, please refer to fig. 2, which shows a structure of the near-eye display device provided by the embodiment of the present application, where the near-eye display device includes: a frame 10, two waveguide sheets 20, a first adjustable device 30, two display devices 40 and two adjustable brackets 50.
The lens frame 10 includes two lens frame holders 11, and the two lens frame holders 11 are adapted to accommodate the waveguide 20 corresponding to the left and right eye positions of a person. In the embodiment shown in fig. 2, the two lens frame brackets 11, the two waveguide sheets 20, the two display devices 40 and the two adjustable brackets 50 are arranged in a mirror image symmetry, and the lens frame brackets 11 wrap only one side of the waveguide sheets 20. In other embodiments, the two devices and apparatuses may be not symmetrically distributed, or only one side may be reserved, and the frame support 11 may not be shaped as shown in fig. 2, specifically, may be set and selected according to the practical application scenario, and need not be limited by the embodiment of the present application.
The two waveguide plates 20 are used for outputting imaging light to human eyes, and the two waveguide plates 20 are respectively arranged on the two frame brackets 11. Referring to fig. 3, a top view of a near-eye display device provided in an embodiment of the present application in an operating scene is shown, in an embodiment of the present application, the waveguide sheet 20 is a grating optical waveguide or a geometric array optical waveguide, and the waveguide sheet 20 includes: the light-emitting surface of the display device 40 is arranged towards the light-entering surface of the coupling-in region 21, and the light-emitting surface of the coupling-out region 22 is arranged towards the human eye. The coupling-in regions 21 and the coupling-out regions 22 may be replaced by geometrical or diffractive optical elements such as prisms, relief gratings, holographic gratings, etc., and the coupling-in regions 21 and the coupling-out regions 22 may be combined with the total reflection regions 23 in various ways, such as covering the upper and lower surfaces of the total reflection regions 23 or embedding the total reflection regions 23.
In addition, in the embodiment shown in fig. 3, the coupling-in area 21 and the coupling-out area 22 are both disposed on the surface of the total reflection area 23 in a fitting manner, and the display device 40, the coupling-in area 21 and the coupling-out area 22 are all disposed on one side of the total reflection area 23 close to the human eye. In other embodiments, the display device 40, the coupling-in area 21 and/or the coupling-out area 22 may be disposed on a side of the total reflection area 23 away from the human eye, so long as it is ensured that the imaging light emitted from the display device 40 can enter the total reflection area 23 through the coupling-in area 21, and the imaging light can be output from the coupling-out area 22 to the human eye.
The first adjustable device 30 is used for adjusting the included angle between the two waveguide sheets 20, and the two frame supports 11 are integrally installed through the first adjustable device 30. Preferably, in the embodiment shown in fig. 2, the first adjustable device 30 comprises a first adjustable knob, wherein the angle between the two waveguide plates is adjustable by rotating the adjustable knob.
The two display devices 40 are used for outputting imaging light into the waveguide 20 on the corresponding frame support 11. The display device 40 includes: a micro display screen, an illumination device and/or a collimating lens group. The micro display screen can be one of MEMS (micro electro mechanical system laser scanning projection), LCD (liquid crystal display), LED (light emitting diode display), OLED (organic light emitting diode display), DLP (digital light processing) and LCOS (liquid crystal on silicon), and specifically can be selected according to imaging requirements in actual use situations.
One end of the adjustable bracket 50 is integrally mounted with one of the frame brackets 11, and the other end is integrally mounted with the display device 40, and the adjustable bracket 50 is used for adjusting the relative angle between the display device 40 and the waveguide sheet 20. A second adjustable means is provided on one of the adjustable brackets 50 for adjusting the angle between the display device and the waveguide plate. The second adjustable device may be a rotary table, a spherical positioning device, a cradle head, or the like, which can enable the display device 40 to freely change the orientation of the imaging plane on the space coordinate system, and may be specifically selected according to actual needs.
Preferably, in the embodiment shown in fig. 2, the second adjustable means includes a second adjustable knob 51 and a third adjustable knob 52, wherein a deflection angle of the display device 40 in the horizontal direction is adjustable by rotating the second adjustable knob 51, and a deflection angle of the display device 40 in the horizontal direction is also adjustable by rotating the third adjustable knob 52.
In normal operation, the near-to-eye display device provided by the embodiment of the application has two modes for adjusting the depth of field:
with continued reference to fig. 3, in the first adjustment manner, by adjusting the first adjusting device 30 (i.e. rotating the first adjusting knob), the included angle between the two waveguide plates 20 is changed, so as to adjust the included angle θ of the binocular central line of sight, thereby implementing adjustment of the depth of field of the near-eye display device, that is, the imaging position of the virtual image.
Referring to fig. 4, which is a top view of the near-eye display device provided in the embodiment of the present application under a working scene, in a second adjusting manner, by adjusting a second adjustable device (i.e. rotating a second adjusting knob 51 and/or a third adjusting knob 52) on the adjustable bracket 50, an alignment direction of the display device 40 is changed, so as to adjust an outgoing position and direction of imaging light, so as to change an included angle θ of binocular central vision, thereby adjusting a depth of field of the near-eye display device, that is, an imaging position of a virtual image.
Further, under the limiting condition, when the display device 40 is disposed opposite to the light incident surface of the coupling-in area 21 as shown in fig. 3 and the two total reflection areas 23 are disposed on the same plane as shown in fig. 4, the light of the central view field is perpendicular to the total reflection area 23 and the total reflection area 23 is horizontally disposed with respect to the eyes, at this time, the binocular central vision line is parallel, and the virtual image is displayed at infinity.
It should be noted that, in the embodiment of the present application, the near-eye display device shown in fig. 2 to 4 is an optical waveguide near-eye display device, and in actual use, the near-eye display device in the embodiment of the present application is not limited to the optical waveguide near-eye display device, but may be other near-eye display devices such as a free-form surface, a holographic retinal projection, etc., and specifically, may be designed according to actual needs, without being limited by the embodiment of the present application.
Further, in some embodiments, the near-eye display device further comprises: an eye tracking device (not shown) is provided on the frame 11 or the waveguide 20 for tracking the rotation angle of the pupil of the human eye to obtain the gazing distance of the human eye. The eye tracking device includes: the infrared ray transmitting device and the infrared ray receiving device are arranged towards human eyes. When the eye tracking device works, infrared rays are emitted towards eyes, part of the emitted infrared rays enter pupils of a person, part of the infrared rays are reflected on the pupils, the rotation direction of the eyes of the person can be determined by analyzing the reflected light rays, and the change condition of the included angle of the rotation of the two eyeballs of the person can be determined by installing the eye tracking device on the left and right two lens frame supports 11 or the two waveguide sheets 20 respectively and aligning the eye tracking device with the eyes.
In some embodiments, the near-eye display device further comprises: a microcontroller coupled to the display device 40, the first adjustable device 30, the second adjustable device, and the eye-tracking device, respectively. The microcontroller can receive the gazing direction and distance of the human eye fed back by the eye movement tracking device, and output a control instruction and a control signal after calculation to know the relative positions of the display device 40, the first adjustable device 30 and/or the second adjustable device in space so as to realize intelligent automatic adjustment. Preferably, the near-eye display apparatus may further comprise a battery pack electrically connected to the display device 40, the first adjustable means 30, the second adjustable means, the eye tracking device and the micro controller, respectively, for powering the display device 40, the first adjustable means 30, the second adjustable means, the eye tracking device and the micro controller.
The embodiment of the application provides near-eye display equipment, which comprises the following components: the near-to-eye display system provided by the embodiment of the application can adjust the orientation of the waveguide sheet and the display device in space through the first adjustable device and the adjustable support so as to adjust the depth of field of a virtual image incident to human eyes.
It should be noted that the above-described apparatus embodiments are merely illustrative, and the units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the application, the steps may be implemented in any order, and there are many other variations of the different aspects of the application as described above, which are not provided in detail for the sake of brevity; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (10)
1. A near-eye display device, comprising:
a frame comprising two frame supports;
the two waveguide sheets are used for outputting imaging light rays to human eyes and are respectively arranged on the two mirror frame brackets;
the first adjustable device is used for adjusting the included angle between the two waveguide sheets so as to adjust the included angle of binocular central vision to adjust the depth of field of the near-eye display equipment and the imaging position of the virtual image, and the two lens frame supports are integrally installed through the first adjustable device, wherein the first adjustable device is used for adjusting the included angle between the two waveguide sheets at the side far away from human eyes to be less than or equal to 180 degrees;
two display devices for outputting imaging light into the waveguide sheet on the corresponding frame support;
and one end of the adjustable bracket is integrally installed with the mirror frame bracket, and the other end of the adjustable bracket is integrally installed with the display device and is used for adjusting the relative angle between the display device and the waveguide piece.
2. The near-eye display device of claim 1, wherein the display device comprises a display device,
a second adjustable device is arranged on the adjustable bracket and is used for adjusting the angle between the display device and the waveguide piece.
3. The near-eye display device of claim 2, wherein the display device comprises a display device,
the first adjustable device comprises a first adjustable knob, wherein the included angle between the two waveguide sheets can be adjusted by rotating the adjustable knob.
4. A near-eye display device of any one of claim 2 or 3, wherein,
the second adjustable device comprises a second adjustable knob and a third adjustable knob, wherein the deflection angle of the display device in the horizontal direction can be adjusted by rotating the second adjustable knob, and the deflection angle of the display device in the horizontal direction can also be adjusted by rotating the third adjustable knob.
5. The near-eye display device of claim 4, further comprising: and the eye movement tracking device is arranged on the mirror frame or the waveguide sheet and is used for tracking the rotation angle of the pupil of the human eye so as to acquire the gazing distance of the human eye.
6. The near-eye display device of claim 5, wherein the display device comprises a display device,
the eye tracking device includes: the infrared ray transmitting device and the infrared ray receiving device are arranged towards human eyes.
7. The near-eye display device of claim 6, further comprising: and the micro controller is respectively connected with the display device, the first adjustable device, the second adjustable device and the eye movement tracking device.
8. The near-eye display device of claim 7, wherein the display device comprises a display device,
the waveguide sheet is a grating optical waveguide or a geometric array optical waveguide, the light emergent surface of the display device is arranged towards the coupling-in area of the waveguide sheet, and the coupling-out area of the waveguide sheet is arranged towards human eyes.
9. The near-eye display device of claim 8, wherein the display device comprises a display device,
the display device includes: a micro display screen, an illumination device and/or a collimating lens group.
10. The near-eye display device of claim 9, wherein the display device comprises a display device,
the micro display screen is one of MEMS, LCD, LED, OLED, DLP, LCOS.
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| CN202010332137.2A CN111381377B (en) | 2020-04-24 | 2020-04-24 | Near-to-eye display device |
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| CN111965826B (en) * | 2020-08-27 | 2022-11-15 | Oppo广东移动通信有限公司 | Control method and device of intelligent glasses, storage medium and intelligent glasses |
| CN115236854B (en) * | 2021-04-22 | 2024-04-12 | 华为技术有限公司 | AR frame and AR glasses |
| CN114967156A (en) * | 2022-06-29 | 2022-08-30 | 苏州理湃科技有限公司 | Binocular AR (augmented reality) glasses with image position adjustment function |
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